Intro to Millwright Practice Exam

Which fastener type is commonly used in wood applications for stronger hold?

1. Machine Screw

2. Wood Screw

3. Hex Bolt

4. Self Tapping Screw

The correct answer is: Wood Screw

The wood screw is specifically designed for use in wood applications, making it the ideal choice for achieving a stronger hold in those materials. They typically feature a pointed tip that facilitates driving into wood without the need for a pilot hole, although pilot holes can sometimes be recommended for harder woods. Wood screws have a coarse thread designed to grip into the fibers of the wood securely, creating a strong connection that is less likely to pull out compared to other fastener types. This feature is essential when constructing wooden frame structures or when assembling furniture where a high level of stability is crucial. The length and diameter can also vary to suit different thicknesses and types of wood. In contrast, other types of fasteners, such as machine screws, hex bolts, and self-tapping screws, are designed for specific applications. Machine screws are typically used with a nut or in a tapped hole, making them less suited for wood. Hex bolts are generally used in metal applications or where a strong clamping force is needed, while self-tapping screws are versatile but are predominantly utilized in metal or thinner materials. Thus, for wood applications where a robust hold is required, wood screws are the most effective choice.